21222222300000 has 216 divisors, whose sum is σ = 75433543475472. Its totient is φ = 5659259040000.

The previous prime is 21222222299981. The next prime is 21222222300011. The reversal of 21222222300000 is 322222212.

21222222300000 is a `hidden beast` number, since 212 + 2 + 222 + 230 + 0 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10890124 + ... + 12690123.

It is an arithmetic number, because the mean of its divisors is an integer number (349229367942).

Almost surely, 2^{21222222300000} is an apocalyptic number.

21222222300000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222222300000 is an abundant number, since it is smaller than the sum of its proper divisors (54211321175472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222222300000 is an equidigital number, since it uses as much as digits as its factorization.

21222222300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23580288 (or 23580257 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21222222300000 its reverse (322222212), we get a palindrome (21222544522212).

The spelling of 21222222300000 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, three hundred thousand".